Muffler



Feb. 12, 1935. J, J. CQMPO 1,991,014

MUFFLER Filed Oct. 14, 1931 @fm .dem/o@ 3&1@

(nikkor/M411 i Patented Feb. l2, 1935 VUNITED STATES PATENT OFFICE MUFFLER John J. Compo, Deancc, h10

Application October 14, 1931, Serial No. 568,789

1 Claim. (Cl. 137-160) My invention has for its object to provide a of the cones and are acetyline welded to the muiller that is dependent upon` the principle of drum to prevent blowing or bursting of the silencing that inherently exists in reverse megainutiler. Theouter ends of the cones tightly flt phone constructions. The invention provides an the inner surface of the drum 1. The cone 5 exceedingly simple construction whereby the ex- 10 is located contiguous to the inlet port 4 5 plosive exhaust of internal combustion engines is while the larger end of the cone 11 is located in practically silenced by reason of the progressive proximity to the plane of the smaller end of the dissipation of the pressure of the explosive discone and the smaller end of the cone 1l charges. This produces substantially a'constant is located in slightly spaced relation with re- 1o stream from the muffler upon each discharge of spect to the outlet port 5.' The smaller ends 10 the exhaust gases from the engine. T he flow of each of the cones 10 and 11 are provided A of the gas through the smaller ends of the with vanes 14. In the form shown, the vanes megaphonic members may be restricted by a t the smaller end portions of the vcones 10 plurality of openings formed in the members and 11 and are so formed that four radiating 15 to direct the gases into expansion chambers that vanes are produced and extend at right angles 15 again disperse them through openings in the to each other. The corners formed between rthe smaller end of the said succeeding conical memvanes are located in the axes of the concs 10 ber. l v and 11 and the outer edges of the vanes iit the Y Y The invention consists in other features and inner surfaces of the end portions of the cones.

advantages which will appear from the following The gas entering the cylindrical form 1 20 descriptions and upon examination of the drawthrough the inlet port 4 has opportunity to ing. Mulllers containing the invention may parexpand to a limited degree withiny the' larger take of different forms and may be varied in end of the cone 10. A whirling movement oi their details and still embody the invention. the gas is also produced whichgreatly reduces To illustrate a practical application of the inthespeed of its forward movement. Immediately 25 vention, I have selected two mullers embodying after the rst expansion, the gas is directed in the invention as examples of various embodithe form of a stream towards the outlet of the ments and the details thereof that contain the cone 10 and through the spaces that are formed inventionV and shall describe the selected mufbetween the vanes 14 and the inner surface of v:i0 Ilers hereinafter, it being understood that vathe smaller end portion of the cone 10, which 30 riations may be made without departing from produces a plurality of definitely directed the'spirit of the invention. The particular mufstreams that pass through the openings 16 fler selected is shown in the accompanying formed by the vanes 14 located in the smaller drawing. end of the cone 10. This greatly reduces the Fig- 1 iS a longitudinal SBCOH 0f 911e 0f the degree of expansion or pressure of each stream 35 mulers Selected as an example Flg- 2 is a that takes place upon the yescape ofthe gases longitudinal section of a second muiiler selected from the Smau end of the cone 10 The vanes as luustra'tlve of the embodlment of my mven'" operate tol produce definitely directed streams tion. Fig. 3 is a view of a section taken on that are l permitted to expand orV escape from 40 2115i llnel hleozaselcitdk m Flg'thl the cones and counteract each other laterally as 40 g a. en on e they are allowed to escape into the larger spaces, plane of the line 4--4 indicated in Fig. 2.

In the particular forms of mutllers illustrated which produces conict between the Sudden al' in the drawing, they are each provided with a though greatly redueq expansion O f each 0f cylindrical shell 1 having end walls 2 and 3 we streams' The Whlrhng 0f the gas 1S clecked- 45 that have inlet and exhaust ports 4 and 5 that as 1t enters therlarger end of the cone -1 and are surrounded by suitable sleeves or flanges 6 passes to the Smauerend, .The .gas mythe? sul?" and 7 to enable connection with the exhaust jected t0 the Same Condltlons t0 Which 1i .Was pipes of the engine and with the tail pipe of subjected in the cone 10 and the same reactionsl the muler. -In the form of construction shown 000m' t0 further reduce the (localized pressures 50 in Fig. 1, a pair of conical sheet metal memand produce a Ll/nifOrm delivery and Straight bers 10 and 11 are located within the cylindrical 'line 01 axial ,pressure at the Smaller end 0f wall 1 or drum of the muffler. The larger ends 'the cone 11 as distinct froma whirling moveof each of the cones 10 and 11 are located ment and lateral at the smaller end of the 5 nearer to the n let port than the smaller ends cone 11. The gas passes through the outlet port 55 5 of the muier in a substantially continuous stream of substantially uniform pressure.

In the formof construction shown in Fig. 2 the cylindrical shell 1 is provided with a pair of sheet metal cones 20 and 21. The cones 20 and 21 are secured in positions that are similar to the positions that the cones 10 and 11 are secured in the form of construction shown in Fig. 1. The smaller ends of the cones in the form of construction shown in Fig. 2 are closed except as they may be opened by a controlling valve and except as the gas is .subdivided and directed laterally into the chambers that are formed between the cones 20 and 21 and the drum l. The smaller ends of thev cones are each provided with a row of openings 22 that are formed in the walls of the smaller end portions of the cones. The gas entering through the port 4 is first allowed to expand within thelarger end of the cone 20 and, as it contracts is allowed to escape through the openings 22 of the cone 20iinto the chamber 23. It then enters the cone 21 and again is allowed to escape through the openings 22, formed in the wall of the 'smaller end portion ofthe cone 21, into the chamber 24, formed between the cone 2l and the cylinder 1. In.v order to direct the gas through the openings 22 in the cones 20 and 21, the smaller end of the cones are connected by means of a pipe 25 formed of sheet metal. The end of the pipe', located in the smaller end ofthe cone 21,` is closed by a valve 2'? vthat may be operated by means of a suitable arm and link 28 to open the valve to enable a direct movement of the exhaust products of the engine and produces substantially a uniform movement y and continuous ow of the gases from the outlet port of the muier. 4

I claim:

In amuiiler, a cylindrical drum having inlet and outlet ports, a pair of sheet metal cones located substantially end to end and within the drum andY having a total length substantially equal tothe length of the drum, the larger ends of the cones located nearer the inlet port of the drum than the smaller ends of the cones, the larger ends of the cones fitting the 'surfaces ofl the drum, a plurality of partitioning members positioned in the smaller end of one of the said cones and forming openings forming passages Ways .into the larger end of the other of said ,cones and into the space between the said other of the cones and the Wall of the said drum, the larger end of the said other cone being open and without an end wall, the said partitioning members forming means for preventing the whirling of exhaust gases in the vicinity of the smaller ends of the said cones.

JOHN J COMPO.

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